blue-blackDried upNo change 6.distilled waterNo change (Clear blue)No change (Clear yellow)Dried upNo change Investigation 1A: Testing for Macromolecules Discussion: By observing the table above‚ we could see that Benedict’s test was for reducing sugars‚ iodine test was for the presence of starch‚ filter paper was for the presence of fatty acids‚ and the Biuret test was for amino groups present in proteins. Benedict’s solution was used to test for the presence of simple sugars‚ such as glucose (monosaccharide)
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these factors are absent‚ photosynthesis cannot occur. Materials required Materials list Geranium‚ begonia‚ or impatiens plants (entirely green leaves)‚ coleus with variegated leaves (green and white colored)‚ hot plates and hot-water bath‚ Lugol’s iodine solution in dropper bottles‚ 250-mL beakers‚ 100-mL beakers‚ tongs‚ foreceps‚ Petri dishes‚ glass-marking pencil‚ 70% alcohol Method PART I - Effects Of Light And Dark
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(4:15 minutes) Procedure: Include the answers to the questions below in your lab report. Lab Questions: This procedure is used to separate what two types of bacteria? This separation is based on differences in what physical trait? What is the iodine used for in this staining technique? Why is it important to heat fix the bacteria prior to the staining procedure? If you had a bacteria sample that you knew to be gram positive but your gram stain results indicated that it was gram negative‚ how
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Chemicals in medicines Rakesh Mohan Hallen The words medicine’ and ’drug’ are often used in our country to mean the same substances: any substance‚ manufactured artificially‚ which can help recovery from sickness‚ relieve symptoms or modify a natural process in the body. A medicine is often a mixture of several chemical compounds. Even if it has only one active component compound often other substances are used as fillers or binders to give it bulk. Chemistry‚ the science related to chemical substances
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BIOLOGY LABORATORY Biologically Important Molecules Carbohydrates‚ Proteins‚ Lipids‚ and Nucleic Acids Objectives In this lab you will learn to: 1. Perform tests to detect the presence of carbohydrates‚ lipids‚ proteins‚ and nucleic acids 2. Recognize the importance of a control in a biochemical test 3. Use biochemical tests to identify an unknown compound Introduction Organic molecules are those primarily made up of carbon‚ hydrogen and oxygen. The common organic compounds of living
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repeated using hexane as the solvent instead of water. Part II: Solubility Testing of the Halogen Make baseline observations of what each of the ions and molecules looks like in water and in hexane. First‚ 1mL of the aqueous (water) solution of iodine will be added to a test tube using a dropper in lieu of a graduated cylinder. Appearance of solution will be recorded. Then‚ 1mL of hexane will be added to the test tube mix. Observations of both layers will be recorded. Process repeated for bromine
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Biological Currency The objective of this lab is to figure out whether or not this money is counterfeit. We will attempt to find the information needed to prove that the money is counterfeit or not by looking at it under a microscope and by using iodine drops to compare the money’s result with the results of different items. Counterfeiting money is not a new to any country. It started when paper money was first made. Some countries attempt to counterfeit rivals money to drive their economy downward
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Title : The Vitamin C content of fruit juice Aim : To investigate the vitamin C content of fruit juice. Introduction : [2]Vitamin C‚ also known as the ascorbic acid or the L-ascorbate‚ is required for the growth and repair of tissues in all parts of our body. It is necessary to form collagen‚ an important protein used to make skin‚ scar tissue‚ tendons‚ ligaments‚ and blood vessels. Vitamin C is essential for the healing of wounds as well as for the repair and maintenance of cartilage‚ bones
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October 2014 Periodicity of the Halogens Goal: To design and carry out an experiment that will give enough data to rank the three halogens from highest to lowest electron affinity. Background: The three aqueous solutions given in this experiment are Iodine‚ Bromine‚ and Chlorine; they are all non-polar and dissolve easily in Hexane which is also non-polar. When there is a color change in a mixture that means that it reacted and that there was a double displacement reaction when there is no change then
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polymer (Figure 1). The long chains of glucose that make amylose form a tight helix. If we mix an iodine solution with the amylose‚ the iodine will lodge itself in the interior of the helix. This causes the solution to turn a dark blue color. If the enzyme amylase is added to the solution first‚ it will chemically remove one glucose monomer at a time from the ends. Addition of iodine to this solution does not give a blue color but will be colorless (Distinguish between
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